Twice every day the Bureau of Meteorology sends out the official weather forecasts for towns and cities across Australia. Here's how we work out what to say in them.

Storm clouds move over the Illawarra south of Sydney on Wednesday, November 28 2018. Sydney received more than a month’s worth of rain in just two hours, with Observatory Hill recording 84.6mm by 7am. The November average is 83.8mm.
Dean Lewins/AAP
November 28, 2018